Concept:Low productivity per worker in agriculture is linked to poor farming technology, not farmers' effort.
Explanation:Most West African farmers depend on simple traditional implements such as hoes and cutlasses.
These basic tools limit the area each farmer can cultivate.
As a result, the output produced per worker remains low.
Modern machinery, improved seedlings, and fertilisers are not widely adopted.
Therefore, the low productivity is due to outdated farming implements.
Answer:B. The use of simple traditional implements.